document.write( "Question 812791: I have 50c coins and 20c coins. In total I have 8 coins with a total value of R3,10. How many coins of each type do I have? \n" ); document.write( "

Algebra.Com's Answer #491824 by Edwin McCravy(20056) $\"\"$ $\"About$

You can put this solution on YOUR website!
I have 50c coins and 20c coins. In total I have 8 coins with a total value of R3,10. How many coins of each type do I have?
\n" ); document.write( "

\r\n" );
document.write( "Let x = the number of 50c coins\r\n" );
document.write( "Then 8-x = the number of 20c coins\r\n" );
document.write( "\r\n" );
document.write( ".50x + .20(8-x) = 3.10\r\n" );
document.write( "  50x + 20(8-x) = 310\r\n" );
document.write( "50x + 160 - 20x = 310\r\n" );
document.write( "      30x + 160 = 310\r\n" );
document.write( "            30x = 150\r\n" );
document.write( "              x = 5\r\n" );
document.write( "\r\n" );
document.write( "5 50c coins\r\n" );
document.write( "8-x = 8-5 = 3 20c coins.\r\n" );
document.write( "\r\n" );
document.write( "Edwin

\n" ); document.write( "

\n" );